Powerful control tetrode GM-4B for use in high-power high-voltage electronic voltage stabilizers as a control lamp. Decoration - glass-metal. Working position - vertical. Anode cooling - forced, air, not less than 900 m3/h.

1. Glow current 39 ± 4 A.
2. Cathode emission current per pulse, not less than 9 A.
3. Slope 24 ±4 mA/V.
4. The gain of the 1st grid relative to the 2nd grid is 12.5 ±2.5.
5. The voltage of the 1st grid is negative 31 ±9 V.
6. The voltage of the 1st grid is negative (at Ua=9kV) 50 ±15 A.
7. Interelectrode capacitances:
– grid-cathode, no more than 80 pF,
— anode-cathode, no more than 16.5 pF,
– grid-anode, not more than 0.8 pF.
8. Heating voltage 4.8 – 5.2 V.
9. Temperature of glass and metal junctions with glass from -60 to +85 C.
10. Weight – 6 kg.

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Warranty
All products are covered by a standard 6-month warranty.
Extended warranty is available upon request and is agreed individually; it may affect the final product price.